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Seagate BarraCuda 3.5" 500GB HDD 7200 RPM 32MB Cache SATA 6.0Gb/s -Tested in healthy condition (ST500DM009)
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  • $39.99 
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Seagate ST300MM0048 300 GB Internal Hard Drive - SAS - 10000rpm - 128 MB Buffer
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Seagate
Seagate ST300MM0048 300 GB Internal Hard Drive - SAS - 10000rpm - 128 MB Buffer
  • NAND Flash Memory Type: SLC
  • Average Latency: 12Gb/s
  • Usage: For Enterprise Storage
  • Parts: 5 Year
  • Model #: ST300MM0048
ST6000NM0034 6TB 7.2K 12G 3.5" SAS HDD for Dell T300 T310 T320 T330 T410
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ST2000NM0023 Seagate 2TB 7200RPM 6Gbps 3.5" SAS HDD Hard Drive (ST2000NM0023)
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  • $59.00 
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Dell 400-AKHM - Dell 300GB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell 400-AKHM - Dell 300GB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Model #: 400-AKHM
K4M5W DELL 1TB 7.2K SATA 3.5 LFF 6Gbps HDD KIT FS
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9SV066-150 Dell 146GB 15K SAS 6G SFF Hard Drive
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1DA200-150 Dell 1.2TB 10K SAS 6G SFF Hard Drive
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Western Digital RE3 WD5002ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital RE3 WD5002ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.2ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: WD5002ABYS
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  • $59.00 
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Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive - OEM
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Seagate
Used - Very Good Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive - OEM
  • Brand: Seagate
  • Series: IronWolf Pro
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Model #: ST16000NT001
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  • $463.58 
  • $11.20 Shipping
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WD Purple WD101PURZ 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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WD Purple WD101PURZ 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD101PURZ
Seagate Archive HDD ST8000AS0022 8TB 128MB Cache SATA 6.0Gb/s Internal Hard Drive
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Seagate
Seagate Archive HDD ST8000AS0022 8TB 128MB Cache SATA 6.0Gb/s Internal Hard Drive
  • Average Seek Time: < 12.0ms
  • Average Write Time: < 12.0ms
  • Average Latency: 5.5ms
  • Height (maximum): 26.10mm
  • Model #: ST8000AS0022
HTS541010A7E630 HGST Z5K1000 1TB 5400RPM 6Gbps 2.5" SATA HDD Hard Drive 0J43281
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WD Black 6TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD6003FZBX
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WD Black 6TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD6003FZBX
  • Features: Inspiring performance and capacity WD Black performance storage is designed to enhance your PC experience across heavier computing tasks whether you are a digital artist, video editor, photographer, or gamer. Available with an impressive 256MB of DRAM cache on higher capacity models, the WD Black PC drive is optimized for drive
  • Usage: Gaming Hard Drives
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD6003FZBX
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HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
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HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 7.6ms
  • Average Write Time: 8ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.1mm
  • Model #: 0F23005
Seagate Exos 7E10 ST2000NM000B 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate
Seagate Exos 7E10 ST2000NM000B 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST2000NM000B
Seagate Exos 10E2400 ST1200MM0009 1.2TB 10K RPM 512n SAS 12Gb/s 2.5-Inch Enterprise Hard Drive
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Seagate
Seagate Exos 10E2400 ST1200MM0009 1.2TB 10K RPM 512n SAS 12Gb/s 2.5-Inch Enterprise Hard Drive
  • NAND Flash Memory Type: SLC
  • Features: The Seagate Enterprise Performance 10K HDD is an ideal 1.2 TB hard drive for mission critical applications. It delivers best-in-class mission critical random performance, highest capacities and the low power that data centers need to meet demanding service level agreements and to keep up with data growth and reduce IT
  • Usage: For Enterprise Storage
  • Model #: ST1200MM0009
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Dell 0RWR8F - Dell 2.4TB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell 0RWR8F - Dell 2.4TB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Model #: 0RWR8F
Seagate SV35.5 ST31000525SV 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s Internal Hard Drive
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Seagate SV35.5 ST31000525SV 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s Internal Hard Drive
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST31000525SV
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  • $76.10 
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Dell 8TB 7.2K 12Gbps NL SAS 3.5 HDD 512e (M40TH)
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  • $650.00
  •  
  • $500.00 
  • Save: 23%
WL 1TB 32MB Cache 7200RPM SATA2 (3.0Gb/s) 3.5" Internal Desktop Hard Drive (For CCTV DVR, NAS, PC/Mac) -1 Year Warranty
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WL 1TB 32MB Cache 7200RPM SATA2 (3.0Gb/s) 3.5" Internal Desktop Hard Drive (For CCTV DVR, NAS, PC/Mac) -1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL1000SATA3272-S3
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  • $59.99 
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Seagate Exos X14 10TB 7200 RPM SATA 6Gb/s 256MB Cache 512e/4Kn Enterprise 3.5-Inch Internal Hard Drive (ST10000NM0478)
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  • $165.00 
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Seagate ST4000NM0023 4TB 7.2K 6Gb/s 128MB 3.5" SAS Hard Drive
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Dell HUS156060VLS600 W348K 600GB 15K 6Gb/s 3.5" SAS Hard Drive - (ZERO HOURS)
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1V4207-150 Dell 4TB 7.2K SAS 12G LFF Hard Drive
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Desktop internal hard drives store operating systems, system files, software and individual files. They can offer anywhere from 500GB of storage up to 8TB or more and come with a variety of interfaces. Although most internal drives are 3.5in., some devices use a smaller 2.5in. form factor. Smaller and larger physical sizes are rare but do exist. Also, consider the speed of the drive. Internal hard drives for desktop computers tend to run at 7,200 revolutions per minute (RPM) but faster read-write speeds minimize waiting time. Hard drives with speeds of up to 15,000 RPM are available. Finally, memory cache is the amount of memory that can be active at any given time. A larger cache is important if you work with multiple large files at once.

Improve Your Computer's Performance with a New Hard Drive

You might not be concerned about storage space when you buy a new PC, but the hard drive will fill will with files and software. A new desktop internal hard drive can replace an existing drive that has reached maximum capacity. Alternatively, if your motherboard has a spare bay, you can add a second or additional device to expand storage. An internal HDD for PCs is easy to install, has greater capacity and speed than an external device and comes with multiple storage options.

Store All Your Data with Large Capacity Drives

Every piece of software you install, every song you save, every video you download takes up storage space, which can slow down a computer. A 720p movie takes up approximately 8GB, while a 4k video can consume as much as 100GB of a desktop internal hard drive. Even the Windows 10 operating system requires 15GB. A 500GB hard drive can be useful for storing files while you're on the move before transferring them to a larger drive if you don't have a personal cloud device or portable hard drive. For everyday and ongoing storage, this size drive will quickly fill up. Desktop internal hard drives offer the storage of up to 16TB in some cases, providing plenty of space for software and files.

Ensure Compatibility by Choosing the Right Interface

The most commonly used standards for connecting a desktop internal hard drive to a motherboard are SATA and SAS. Determine the motherboard's interface and ensure that you match this when buying a new drive to ensure compatibility and to avoid having to use an adapter. Check the label off the drive you are replacing or look at the manufacturer guidelines for your motherboard.

Access Data Quicker with a Fast SATA Internal Hard Drive

The speed the disk platters spin determines how quickly information can be retrieved from the drive. It is common for external hard drives to have a speed of 5,000 RPM because this draws less power and makes minimal noise. Other hard drive designs have a speed of up to 15,000 RPM, depending on the model.

Bestselling Desktop Internal Hard Drives Reviews:

Perry K.
3/26/2026 7:05:57 AM
Seagate Barracuda 2TB Hard Drive

“ Received and installed new Seagate Hard Drive in older Dell Inspiron PC. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
Anonymous
1/22/2026 4:08:37 PM
Perfect 28TB NAS Drives Great For UGREEN Plex

“ One drive is my primary Plex/media volume, the other is my internal backup. ”

Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive